Method and device for processing an image in order to construct

Details Method and device for processing an image in order to construct Method and device for processing an image in order to construct

1994-12-20

1996-12-17

Herndon, Heather R.

395127, G06T 1520

Patent

active

055862314

ABSTRACT:
A method of processing a digital image in order to construct a calculated image, termed the target image (I*), which represents a so-called source image (I) reconstructed with modifications to the tilting angle, panning angle and scale factor in relation to this source image. This method includes determining a common view point (P), for the source image (I) and the target image (I*), as the origin of an orthonormal reference frame; and calculating, for every pixel (M*) with address (X*, Y*) in the target image (I*), spherical coordinates (.alpha., .beta.) by a linear function G.sup.-1 such that (.alpha., .beta.)=G.sup.-1 (X*Y*), the coefficients being functions of the modified tilting and panning angles and scale factor. Finally, the method includes reading a pair (X, Y) which is stored in a table and which constitutes the address of a point (M), in the source image (I), corresponding to the pixel (M*) in the target image (I*), by the matching, to the resolution of the table, the spherical coordinates (.alpha., .beta.) with one of the addresses (.alpha..sub.o, .beta..sub.o) of the table.

REFERENCES:
patent: 4734690 (1988-03-01), Waller
patent: 4752828 (1988-06-01), Chapuis et al.
patent: 4807158 (1989-02-01), Blanton et al.
patent: 4969036 (1990-11-01), Bhanu et al.
patent: 5444478 (1995-08-01), Lelong et al.
"Computer Image Processing and Recognition" E.K. Hall, Academic Press 1979 Chapter 3, pp. 76 ET SEQ. pp. 76-88.

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